The patent badge is an abbreviated version of the USPTO patent document. The patent badge does contain a link to the full patent document.
The patent badge is an abbreviated version of the USPTO patent document. The patent badge covers the following: Patent number, Date patent was issued, Date patent was filed, Title of the patent, Applicant, Inventor, Assignee, Attorney firm, Primary examiner, Assistant examiner, CPCs, and Abstract. The patent badge does contain a link to the full patent document (in Adobe Acrobat format, aka pdf). To download or print any patent click here.
Patent No.:
Date of Patent:
Sep. 24, 2013
Filed:
Apr. 21, 2011
Paolo Pasero, Turin, IT;
Alberto Vassallo, Turin, IT;
Federico Luigi Guglielmone, Rivoli, IT;
GM Global Technology Operations LLC, Detroit, MI (US);
Abstract
A method is provided for estimating the relative humidity in an intake line of an internal combustion engine provided with an intake manifold connected to the intake line, an exhaust line, and a Low Pressure EGR (LPE) conduit which fluidly connects the exhaust line to a connecting point of said intake line. The method includes, but is not limited to calculating specific humidity in the exhaust line, as a function of the Oconcentration in said exhaust line; determining ambient specific humidity; calculating specific humidity in a portion of the intake line comprised between said connecting point and said intake manifold, as a function of a flow of external air entering into said intake line, a flow of exhaust gases coming from said Low Pressure EGR (LPE) conduit, the specific humidity in said exhaust line and the ambient specific humidity; calculating the relative humidity in said portion of the intake line, as a function of the specific humidity thereof.